Legacy:ObjectPath

UT :: Actor (UT) >> Keypoint (UT) >> ObjectPath (Package: UnrealShare)

Allows an object to follow a defined path, by specifying PathPoint nodes.

Note: At least 4 PathPoints must exist. The first and last do not need speed/deltaU settings. Maximal 35 nodes are possible and because the first and last are dummies, 33 real positions are possible.

Note: If there are N points to interpolate through, there must be in total N+2 points specified. Point 0 and Point N+1 are dummy control points, where Point 1-Point 0 is the initial direction of motion, and Point N+1 - Point N is the final direction of motion. The object will start at point 1 and end up at point N.

Uses the Bernstein basis functions for Bezier interpolation:
B0(u) = (1-u)^3
B1(u) = 3u(1-u)^2
B2(u) = 3u^2(1-u)
B3(u) = u^3

Properties

ObjectPath Group

bool bAlterPitch

Should the pitch of the actor be modified during movement.

bool bAlterYaw

Should the yaw of the actor be modified during movement.

bool bAlterRoll

Should the roll of the actor be modified during movement.

name PathActorTag

The Tag of the actor which should be moved. Only the first found Actor with this tag will be moved.

rotator RAdjust

Adjust the rotation of the object.

Hidden

bool bPlayedOnce

Really don't play it again since it's already finished last time

bool bTriggeredOnce

Don't repeat the path if it's already played through

int curNode

Which node are we at?

vector lastPosition

Where the actor was in the most recent frame

rotator lastRotation

The orientation of the actor in the most recent frame

int numPathNodes

how many elements in the path array

Actor (UT) PathActor

what should be moved

PathPoint Path[35]

maximum 35 nodes in the path, hence 33 real positions

float uValue

Offset in the segment

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The main property that needs to be set for this is advanced > bStatic to false. Use along with pathpoints to make dynamic moving vehicles.

Imagine the applications in Unreal 2 :)

Wormbo: Funny to see pages like this over one year later. :p